Double Cross Square: Faceting Design Diagram
Helpful tips and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Double Cross Square".
Zircon (Hyacinth, Starlite)
Double Cross Square (ZIRCON6.JRG)
By Jeff R. Graham
88.8% Light Return
Angles for R.I. = 1.93
101 facets + 8 facets on girdle = 109
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.505 T/L = 0.505
P/W = 0.448 C/W = 0.201
H/W = (P+C)/W+0.02 = 0.669
P/H = 0.670 C/H = 0.300
Vol./W^3 = 0.286
Addition # 2 - This design is not as hard to cut as it might look, it is all cut to center point except for the 2 step cuts. However, this design is not for a new cutter, unless you just want to try it, 1-18cts. Cut in refractive indexes 1.76 to 2.14 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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